Final answer:
To subtract 1.7 x 10^8 from 405,000,000, rewrite both numbers in scientific notation. Subtract the exponents and then subtract the coefficients. The result is 2.35 x 10^1 or 2.35.
Step-by-step explanation:
To subtract 1.7 x 10^8 from 405,000,000, we can rewrite both numbers in scientific notation. 405,000,000 can be written as 4.05 x 10^8. Then, we subtract the exponents: 8 - 7 = 1. Finally, we subtract the coefficients: 4.05 - 1.7 = 2.35.
Therefore, the result of subtracting 405,000,000 - 1.7 x 10^8 is 2.35 x 10^1 or 2.35.